Greatest Common Factor of 66, 18, 20, 64

Greatest common factor or Greatest common divisor (GCD) can be calculated in two ways

• Greatest Common Factor of 66, 18, 20, 64 by common division method
• Greatest Common Factor of 66, 18, 20, 64 with matching the biggest common factor

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∴ So the GCF of the given numbers is 2 = 2

Factors of 66

List of positive integer factors of 66 that divides 66 without a remainder.

1,2,3,6,11,22,33,66

Factors of 18

List of positive integer factors of 18 that divides 18 without a remainder.

1,2,3,6,9,18

Factors of 20

List of positive integer factors of 20 that divides 20 without a remainder.

1,2,4,5,10,20

Factors of 64

List of positive integer factors of 64 that divides 64 without a remainder.

1,2,4,8,16,32,64

Greatest Common Factor

We found the factors 66,18,20,64 . The biggest common factor number is the GCF number.
So the greatest common factor 66,18,20,64 is 2.

Here are some samples of GCF of two or more Numbers calculations.

• GCF of 41, 37, 98, 29
• GCF of 97, 43, 29, 74
• GCF of 42, 45, 35, 28
• GCF of 21, 75, 40, 32
• GCF of 36, 54, 15, 30

1. What is the GCF of 66, 18, 20, 64?

Answer: GCF of 66, 18, 20, 64 is 2.

2. How to Find the GCF of 66, 18, 20, 64

Answer: Greatest Common Factor(GCF) of 66, 18, 20, 64 = 2

Step 1: Divide all the numbers with common prime numbers having remainder zero.

Step 2: Then multiply all the prime factors GCF(66, 18, 20, 64) = 2.